rpuch commented on code in PR #6330:
URL: https://github.com/apache/ignite-3/pull/6330#discussion_r2239864222
##########
modules/low-watermark/src/test/java/org/apache/ignite/internal/lowwatermark/LowWatermarkImplTest.java:
##########
@@ -336,6 +342,36 @@ void
testUpdateAndNotifyNotInvokeFailureManagerWhenGetNodeStoppingException() {
verify(failureManager, never()).process(any());
}
+ @Test
+ void testParallelScheduleUpdates() throws Exception {
+ assertThat(lowWatermarkConfig.updateIntervalMillis().update(300L),
willCompleteSuccessfully());
+
+ assertThat(lowWatermark.startAsync(new ComponentContext()),
willCompleteSuccessfully());
+
+ runRace(
+ () -> lowWatermark.scheduleUpdates(),
+ () -> lowWatermark.scheduleUpdates(),
+ () -> lowWatermark.scheduleUpdates(),
+ () -> lowWatermark.scheduleUpdates()
+ );
+
+ Thread.sleep(1_000);
+
+ verify(lwmChangedListener, atLeast(2)).notify(any());
Review Comment:
But what if this thread gets delayed for some reason for another second?
Will this result in more than 4 invocations?
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